Minnesota U.S. Sen. Amy Klobuchar, working an image of down-home Midwestern charm, introduced America to an aspect of her life last week that candidates usually shy from on the campaign trail: her dating history. “My first Senate race, I literally called everyone I knew and I set what is still an all-time Senate record: I raised $17,000 from ex-boyfriends,” Klobuchar said during the fifth Democratic presidential primary debate in Atlanta. (snip) While the quip may be new to national audiences, the Minnesota Democrat has been using the line for years. “I raised $17,000 from ex-boyfriends — true story!” she told...